73811321 has 2 divisors, whose sum is σ = 73811322. Its totient is φ = 73811320.

The previous prime is 73811273. The next prime is 73811327. The reversal of 73811321 is 12311837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73342096 + 469225 = 8564^2 + 685^2 .

It is an emirp because it is prime and its reverse (12311837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73811321 - 2²⁶ = 6702457 is a prime.

It is a super-2 number, since 2×73811321² = 10896222215530082, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73811327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36905660 + 36905661.

It is an arithmetic number, because the mean of its divisors is an integer number (36905661).

Almost surely, 2^73811321 is an apocalyptic number.

It is an amenable number.

73811321 is a deficient number, since it is larger than the sum of its proper divisors (1).

73811321 is an equidigital number, since it uses as much as digits as its factorization.

73811321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 73811321 is about 8591.3515234799. The cubic root of 73811321 is about 419.4765228037.

The spelling of 73811321 in words is "seventy-three million, eight hundred eleven thousand, three hundred twenty-one".